Radiocarbon Dates of Elevated Shorelines, Indonesia and Malaysia. Part 1

Tjia, H. D.; Fujii, Shoji; Kigoshi, Kunihiko; Sugimura, Arata; Zakaria, Thomas

doi:10.1016/0033-5894(72)90087-7

Cited by 13 publications

(30 citation statements)

References 5 publications

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“…However, the age of the younger volcanic rocks in the Semporna Peninsula area is not well established. Lim & Heng (1985) suggest ages of 27 ka or younger, which fits nicely with age data of Tjia et al (1972).…”

Section: Raised Coral Reef Semporna Area Sabahsupporting

confidence: 72%

“…Calibrated using the local Delta R value of -37+/-70, the 2-sigma age range for this coral sample is 29,108-25,994 cal yr BP. The coral reef limestone that this sample came from was measured to rise to +20 m (Tjia et al, 1972). Taira & Hashimoto (1971) radiocarbon dated several coral and oyster samples from the Semporna area with results ranging from 30-36 ka.…”

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

“…Based on the range of estimates determined by different researchers, it is likely these raised coral reef limestones are not all the same age. The youngest age (29,108-25,994 cal yr BP) of Tjia et al (1972) constrains the timing of uplift to after that time. Since global sea level was well below present ca.…”

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

“…Based on the findings of Taira & Hashimoto (1971) and Tjia et al (1972), Tjia (2006) estimated an annual uplift rate for the Semporna area of 7 mm/yr. However, although the Semporna region has clearly been uplifted, possibly within the last ca.…”

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

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Late Cenozoic relative sea-level highstand record from Peninsular Malaysia and Malaysian Borneo: Implications for vertical crustal movements

Parham¹

2016

BGSM

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In order to predict the manner in which global sea-level change will impact the wide variety of coastal conditions and communities in Malaysia, this study sought to gain insight into the vertical components that determine the relationship between the coastal land areas of Malaysia and changes in sea level over time periods of 10 6 to 10 2 years. This was a regional-scale, reconnaissance-level field survey of the Malaysian coasts, coastal plains, most islands and many river systems to determine the presence, absence and spatial variability of evidence for late Pliocene-Quaternary sea level(s) higher than present. In Peninsular Malaysia, no conclusive evidence was found to indicate that RSL was ever higher than the mid-Holocene maximum during the late Cenozoic. This indicates long-term (10 4 to 10 6 yrs) subsidence for at least the coastal parts of the region. Superimposed on this long-term subsidence are eustatic rise and continental levering associated with hydro-isostatic adjustment (HIA) over time scales of 10 2 to 10 3 yrs. In areas where HIA appears to be in equilibrium (e.g. NE Peninsular Malaysia), long-term subsidence and eustatic rise are the dominant factors influencing RSL change, resulting in increased flooding and coastal erosion. These detrimental effects are commonly exacerbated by anthropogenic activities. Along much of the remainder of the Peninsular Malaysia coast, uplift associated with HIA appears to continue, counterbalancing eustatic rise and resulting in little net change in RSL. This, in tandem with abundant sediment supply, has resulted in generally prograding coasts in areas minimally influenced by anthropogenic modifications. The RSL record of Malaysian Borneo is much more complex, even in western Sarawak, which is situated on supposedly stable Sundaland. Possible strandplain deposits overlying coarse alluvium in the Kuching area could reflect last interglacial highstand deposition but more likely result from uplift or eolian reworking of alluvial deposits. This alluvium, along with similar deposits associated with the Kayan and Rajang rivers, clearly represents deposition under very different environmental conditions than present. Ongoing subsidence of the peatland-dominated coastal plain, from Kuching to Bintulu, is probably mainly due to sediment loading. North of the Lupar Line, RSL histories are mainly the product of tectonism and differential movement of the upper crust. The coast and interior from Bintulu, Sarawak to Bongawan, Sabah, has undergone Quaternary uplift, probably episodic and differential, with the most recent uplift event in the Miri area during the early mid-Holocene. Relative vertical stability is suggested for mid-Holocene to present. Geomorphic indicators and lack of emergent RSL indicators along the western Sabah coast, north of Bongawan, suggest ongoing subsidence. The RSL record from eastern Sabah is exceedingly complex with, sometimes close-spaced, areas with different histories of movement over time scales of 10 1 to 10 6 yrs.

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Section: Raised Coral Reef Semporna Area Sabahsupporting

confidence: 72%

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

Section: Raised Coral Reef Semporna Area Sabahmentioning

confidence: 99%

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Late Cenozoic relative sea-level highstand record from Peninsular Malaysia and Malaysian Borneo: Implications for vertical crustal movements

Parham¹

2016

BGSM

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“…Locally, sea level departs from the global average due to the combined effects of glacial isostatic adjustment (GIA) (Milne and Mitrovica, 2008), including ocean syphoning (Milne and Mitrovica, 2008;Mitrovica and Milne, 2002;Mitrovica and Peltier, 1991) and the redistribution of water masses due to changes in gravitational attraction and Earth rotation following ice mass loss (Kopp et al, 2015). These processes are superimposed to land level changes due to geological processes, such as subsidence resulting from sediment compaction or tectonics (e.g., Tjia et al (1972) and Zachariasen, (1998)). Sea-level reconstructions in areas far from polar regions (i.e., far-field, Khan et al, 2015) show a rapid sea-level rise after the onset of Holocene, followed by a GIA-driven sea level highstand in many equatorial areas between 6 and ~3 ka BP (when ice melting was at its maximum), and a subsequent sea-level fall.…”

Section: Introductionmentioning

confidence: 99%

Holocene and Common Era sea level changes in the Makassar Strait, Indonesia

Bender

Mann

Stocchi

et al. 2019

Preprint

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Abstract. Indonesia is a country composed of several thousand islands, many of them small, low-lying and densely inhabited. These are, in particular, subject to high risk of inundation due to future relative sea level changes. The Spermonde Archipelago, off the coast of Southwest Sulawesi, consists of more than 100 small islands. This study presents a dataset of 24 sea-level index points from fossil microatolls, surveyed on five islands in the Spermonde Archipelago and compares these new results with published data from the same region and with relative sea level predictions from different Glacial Isostatic Adjustment (GIA) models. The newly surveyed fossil microatolls are located around the islands of Tambakulu, Suranti (both ~ 60 km offshore of Makassar city), Bone Batang and Kodingareng Keke (both located in the center of the Archipelago) and Sanrobengi (located ~ 20 km south-southwest of Makassar). Results from the near- and mid-shelf islands indicate that relative sea level between 4 to 6 ka BP was less than one meter above present sea level. The only exception to this pattern is the heavily populated island of Barrang Lompo, where we record a significant subsidence when compared to the other islands. These new results support the conclusions from a previous dataset and are relevant to constrain late Holocene ice melting scenarios. Samples from the two outer islands (Tambakulu and Suranti) yielded ages spanning the Common Era that represent, to our knowledge, the first reported for the entire Southeast Asian region.

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